What is the crowd's opinion of TCPView?

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Microsoft's TCPView worked for me when steam was stuck updating indefinitely/repeatedly. Download, run, find steam.exe, right click and 'close connection'. Steam found a new server (is my understanding..), update went through instantly.
https://technet.microsoft.com/en-us/sysinternals/bb897437.aspx

Check that nothing is running in docker with "docker ps". You can use "netstat -ab" in cmd.exe to list open ports. Easier is downloading a util that list ports:

https://technet.microsoft.com/en-us/sysinternals/bb897437.aspx http://www.nirsoft.net/utils/cports.html

Restarting your computer would also close any open ports that were not shut down correctly.

If wireshark seems to much for you then you might have issues grasping other applications. You can try TCPView or netwatcher. They're fairly straight forward applications.

Then look for odd incoming or outgoing traffic. There are other options too these are the only two links i knew offhand on mobile.

You may want to use Hijack This to search for malware/processes: http://sourceforge.net/projects/hjt/

I prefer netstat -a or tcpview (https://technet.microsoft.com/en-us/sysinternals/bb897437.aspx) myself. To identify network traffic.

Wired or wireless connections?

Could the data switch be overloading?